I'm trying to mine with 2xRX 480 in the same rig but I fail in something. Windows 10 detects both GPUs. If I try to mine with Ethminer or Qtminer i have the "No GPU device with sufficient memory" error. If I list the cards on qtminer or ethminer they found both with 8g of memory.
I only can mine with this sentence but qtminer only detect one card: qtminer.exe -s eu1.ethermine.org:4444 -u mywallet.rig3 -G --opencl-device 0 --opencl-platform 1
If I miss --opencl-device 0 part, only detect one card too.
Log: C:\Users\Miner\Desktop\qtminer>qtminer.exe -s eu1.ethermine.org:4444 -u walletadress.rig3 -G --opencl-platform 1 Qt: Untested Windows version 10.0 detected! i 21:35:34|main Connecting to stratum server eu1.ethermine.org : 4444 i 21:35:34|main Connection to stratum server established! Found suitable OpenCL device [Ellesmere] with 8589934592 bytes of GPU memory i 21:35:34|main Login to stratum server successfull i 21:35:34|main Work package received i 21:35:34|main Grabbing DAG for #002440e1ÔÇª